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Does anyone have good resource info on cell replacement?

Doing a kid's book and need to find out info on how quickly cells are replaced in the human body. I know that some turn over very quickly (liver or kidney) and others more slowly (bone) but that they are all replaced over a decade or two (well, I think so, anyway). Anyone know of a resource? I tried googling but could only find stuff on cancer, etc.

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http://askanaturalist.com/do-we-replace-our-cells-every-7-or-10-years/http://www.nytimes.com/2005/08/02/science/02cell.htmlhttp://boards.straightdope.com/sdmb/showthread.php?t=372183 (Scroll to JR Brown's posts for a list of citations)

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